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Write down the character tests functions and their tests.

In the following table the required functions and their tests are given. 

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Function                       Test


isalnum(c)                     Is c an alphanumeric character?
isalpha(c)                     Is c an alphabetic character?
isdigit(c)                     Is c a digit?
islower(c)                     Is c a lower case letter?
isprint(c)                     Is c a printable character?
ispunct(c)                     Is c a punctuation mark?
isspace(c)                     Is c a white space character?
isupper(c)                     Is c an upper case later?

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